closed-orbits

常見例句

Some sufficient condition to guarantee the existence of global invariant manifolds consisting zero homotopic closed orbits is gived.
同時給出了這類系統(tǒng)存在由第一類（零倫）閉軌組成的全局不變流形的條件。
Perhaps, the most famous one is the Comet Halley, it has a closed orbit with a period of 76 years.
最出名的封閉式軌道彗星當然是以76年的周期繞日運行的哈雷彗星。
By using the closed orbit theory, the photodetachment cross section of H- near a metal surface is derived and calculated.
利用閉合軌道理論，我們推導和計算了H-在金屬面附近的光剝離截面。
Unlike the case of the photodetachment of H- near an elastic interface, the length of the closed orbit does not equal the twice distance between the ion and the surface.
傅立葉變換截面中的每一條共振峰正好和電子的一條閉合軌道相對應。
The period, action, and length of the detached electron’s closed orbit are nearly the same as the case of the photodetachment of H- near an elastic interface.
因此可以用彈性截面模擬金屬面。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之,如果恒星很小,維持生命的行星就要在離恒星很近的軌道上運行,而且要有極好的條件才能使生命得以發(fā)展